Write a program to send the value 0X45 to PORTB and 0X54 to PORTC every 1/4 second. Assume a clock frequency of 1 MHz. Write a program that will monitor the PB4 bit until it becomes LOW; when it becomes LOW, write the value 0XFF to PORTD. Which register is affected by the execution of an arithmetic instruction? When using a conditional branch instruction, which register is checked for its status? What is the main difference between the rotate and shift instructions? Write a program that will add the values 0X45 and 0X20 and the sum is multiplied by 0X03 and the result is sent to PORTB Write a program that will find the position of the first low in an 8-bit data item. the data is scanned from D7 to D0. Give the result for 0XF4 How do you define constant values in assembly? Give an example. the different ways in which the CPU access data is known as the _. Match the instructions in the first column with their corresponding pair in the second column. How do you place fixed data into program ROM? How do you fetch data from program ROM? Write a program that will read the following message from ROM and place it in data RAM starting at 0X100 .ORG 0X500 MYMESSAGE: .DB "Programming in Assembly is fun!", 0 Write a program that will find y where y = 20x + 5, and x is between 0 and 5